Mill-roll



2 Sheets-Sheet 1.

( 0 Model.)

H. HUNGERFORD. MILL ROLL.

No. 346,817. Patented Aug. 3, 1886.

JA ti/p hn w I PETERS, Pnmo-mM n n-r, wn-hin ton, D4 C.

. (No Model.)

2 Sheets$heet 2. H. HUNGERFOBD.

MILL ROLL.

No. 346,817. Patented Aug. 3, 1886.

UNITED STATES PATENT OFFICE.

HENRY HUNGERFORD, OF NORVVALK, CONNECTICUT.

MILL-ROLL.

SPECIFICATION forming part of Letters Patent No. 346,817, dated August3, 1886.

Application filed February 26, 1885. Serial No. 157,068. (No model.)

To all whom it may concern:

Be it known that I, vHENRY HUNGERFORD, a citizen of the United States ofNorth America, and a resident of Norwalk, county of Fairfield, State ofConnecticut, have invented a new and useful Improvements in Mill Rolls,of which the following is a specification.

Sugar-cane shredders have recently been introduced into use forshredding or breaking the gathered cane preparatory to its delivery tothe mill-rolls, so that the inner portion ofthe cane shall be morethoroughly exposed to the action of the sugar-mill rolls.

Shredders of several forms have been used with greater or lessadvantage, and from their working it has been determined that the bestfinal results will be secured by the shreddingmill that will break thecane lengthwise, not crosswise, without decorticating it or grinding itscentral portion too fine. Crosswise shredding or breaking reduces thecane to such a condition that the sugar-mill rolls cannot readily graspand draw it through, and hence the continuity of the work of the rollsis often seriously interrupted and delayed.

The object of this invention is to provide a mill or cane-shredder ofimproved construc-, tion, whereby a much larger proportion of the canemay be brokenv lengthwise than is possible with any of the mills orshredders now in use. a

The improved shredder or mill is constructed, essentially,of two toothedrolls set opposite each other and arranged to revolve at differentspeeds and in opposite directions, in which particulars it is not unlikesome other shredders; and the invention consists of rings or annulardisks, forming the rolls, whose faces are dressed or toothed in such amanner that by simply adjusting them relatively to each other on a rolldrum or shaft the roll may at will be made to present such several formsor arrangements of teeth as will be best adapted for the work to beperformed, all of which will be hereinafter fully set forth, and pointedout in the claims.

Reference is to be had to the accompanying drawings, forming part of thespecification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side elevation of one of my improved rings or disks. Fig,2 is a face eletion of segments of four rings side by side,

showing another position in which the teeth may be presented on a roll.Fig. 4 is a partlysectional face elevation of my improved ring. Fig. 5is a face elevation of segments of two rings side by side, showing stillanother position in which the teeth may be presented on a roll. Fig. 6isa partly-sectional side elevation, with parts broken away to exhibitother parts, showing my improved mill or shredder in combination with asugar-cane mill and accessories.

' In the drawings, A represents an improved roll-ring, a number of whichare designed to be secured in side contact with each other on a drum orshaft to form a mill or cane-shredder roll, as shown at B, Fig. 6. Thisring, which may be cast with a solid or hollow rim, as may be desired,has a flat face, 'on which teeth I) are formed as integral partsthereof, and on its inner face bearingbars b are cast or inserted tofacilitate the adjustment of the ring on mill drum or shaft. It will beseen that the teeth I) on each ring are arranged.

parallel with each other and extend diagonally across the ring-face atangles of forty-five degrees, or thereabout, to the ring-edges. Theangle may be made to vary according to the work to which the mill isdesigned to be applied; and said teeth are cast with their points orcutting-edgesas shown in Fig. 1, and also pointing in the oppositedirection. Vhile the edges are diagonal and parallel in each disk, thoseof one disk may be made to be inclined in an opposite direction to thoseof another, which constitutes what I term rights and lefts. I mayemploy, for instance, twice as many disks as are necessary to form asingle roll. If I adjust four rights or four lefts upon the shaft, thespiral of the edges will be continuous. If I alternate two of each, theline of the edges will be zigzag. are made at will by taking off thedisks and putting them on again under a different arrangement.

These changes In Fig. 2 are seen two rings arranged side 4 In Fig. twoof my improved toothed rings are indicated arranged side by side, sothat 1 5 the teeth are staggering. Thus it will be seen that with myimproved ring provided with teeth set parallel with each other and at anangle to the ringedges I am enabled to construct mills or shredders withteeth essentially or practically of several forms, so that by simpleadjustment of the rings on shafts or drums I can construct mills forshredding, for which the dressings or arrangements shown in Figs. 2 and5 would be most suitable, or 2 for grinding bark or other substances,for which the dressing or arrangement shown in Fig. 3 would be mostsuitable. It is obvious, then that in simplicity of construction theseadjustable toothed rings have great advantages over all others designedfor like purposes, and that with them a mill adapted for shredding canecan, without-additional cost, be readily adapted to grinding bark orother materials, can be readily adjusted by inter- 5' changing forgrinding a great variety of substances, so that one mill can be made totake the place of several.

In Fig. 6 a mill or cane-shredder, 0, formed by two of my improved rollsB is shown in position in proper housings, in combination withcane-carrier D, shredded-cane conductor I E, and sugar-mill rolls'F.This indicates a suitable arrangement of several of the elements of asugar-cane mill wherein the cane is fed by the carrier to the shredder,and the shred ded cane and juice from the shredder, falling into theconductor, are by their gravity fed to the mill-rolls.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A shredder or mill constructed with adjustablerings having teeth set parallel to each other and diagonally across theface of each ring, the rings made rights and lefts, as described,whereby the mill-rolls may at will be made to present consecutively twoor more forms or arrangements of teeth, as set forth.

2. The combination, with a sugar-cane mill, F, shredded-cane conductorE, and cane-car rier D, of a mill or cane-shredder, 0, provided withrolls constructed of drums or shafts carrying rings on whose faces areteeth set diag' onally and parallel to each other, as set forth.

In testimony that I claim the foregoing as my invent-ion I have signedmy name, in presence of two witnesses, this 25th day of February, 1885.

HENRY HUNGERFORD.

\Vitnesses:

HAMILTON RUDDICK, WILLIAM B. TURNER.

